Agency and Deontic Logic represents a major advance in the field, developing fresh ideas for thinking about longstanding internal problems and making significant connections with external areas of research, most notably decision theory and utilitarian ethical theory. Although the book is technically sophisticated, the discussion is exceptionally clear and readable and benefits greatly from numerous examples and diagrams. Agency and Deontic Logic should interest an audience that includes logicians, computer scientists, and those working in decision theory, game theory, and ethics, as well as applications of these disciplines.